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###### Math · Statistics And Probability
Question details

Independent Samples t Test in SPSS

• Criterion: Calculate an independent samples t test in SPSS.
• Data: Ms Z has two groups of band students. She asks Group 1 to use her new embouchure strengthening cream before practice and has Group 2 practice as usual. The groups scored as following:
• Minutes of practice:
• Group 1: 55, 44, 62, 30, 78, 50, 52.
• Group 2: 31, 40, 53, 22, 41, 16, 33.
 Group Statistics Groups N Mean Std. Deviation Std. Error Mean Minutes Embouchure Cream 1 55.0000 . . No Cream 1 31.0000 . .
 Levene's Test for Equality of Variances t-test for Equality of Means F Sig. t df Sig. (2-tailed) Mean Difference Std. Error Difference 95% Confidence Interval of the Difference Lower Upper Minutes Equal variances assumed . . . 0 . 24.00000 . . . Equal variances not assumed . . . 24.00000 . . .

Problem Set 3.14: Independent Samples t Test

Criterion: Identify IV, DV, and hypotheses, and evaluate the null hypothesis for an independent samples t test.

Data: Use the information from Problem Set 3.13.

Instruction: Complete the following:

a.   Identify the IV and DV in this study.

b.   State the null hypothesis and the directional (one-tailed) alternative hypothesis.

c.   Can you reject the null hypothesis at α = .05? Explain why or why not.

Answer
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